package com.lxp.project.system.service.impl;

import com.lxp.common.annotation.DataScope;
import com.lxp.common.constant.UserConstants;
import com.lxp.common.core.domain.TreeSelect;
import com.lxp.common.core.text.Convert;
import com.lxp.common.enums.UserStatus;
import com.lxp.common.exception.ServiceException;
import com.lxp.common.utils.SecurityUtils;
import com.lxp.common.utils.StringUtils;
import com.lxp.common.utils.spring.SpringUtils;
import com.lxp.project.system.domain.SysDept;
import com.lxp.project.system.domain.SysRole;
import com.lxp.project.system.domain.SysUser;
import com.lxp.project.system.mapper.SysDeptMapper;
import com.lxp.project.system.mapper.SysRoleMapper;
import com.lxp.project.system.service.ISysDeptService;
import com.mybatisflex.core.query.QueryWrapper;
import com.mybatisflex.core.update.UpdateChain;
import com.mybatisflex.core.util.UpdateEntity;
import com.mybatisflex.spring.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import static com.lxp.project.system.domain.table.SysDeptTableDef.SYS_DEPT;

/**
 * 部门管理 服务实现
 *
 * @author lxp
 */
@Service
public class SysDeptServiceImpl extends ServiceImpl<SysDeptMapper, SysDept> implements ISysDeptService {
    @Autowired
    private SysRoleMapper roleMapper;

    /**
     * 查询部门管理数据
     *
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept) {
        // 获取数据权限过滤条件
        String dataScope = (String) dept.getParams().get("dataScope");
        QueryWrapper queryWrapper = QueryWrapper.create()
                .from(SYS_DEPT.as("d"))
                .where(SysDept::getDelFlag).eq("0");
        if (dept.getDeptId() != null && dept.getDeptId() != 0) {
            queryWrapper.and(SysDept::getDeptId).eq(dept.getDeptId());
        }
        if (dept.getParentId() != null && dept.getParentId() != 0) {
            queryWrapper.and(SysDept::getParentId).eq(dept.getParentId());
        }
        if (StringUtils.isNotEmpty(dept.getDeptName())) {
            queryWrapper.and(SysDept::getDeptName).like(dept.getDeptName());
        }
        if (StringUtils.isNotEmpty(dept.getStatus())) {
            queryWrapper.and(SysDept::getStatus).eq(dept.getStatus());
        }
        if (StringUtils.isNotEmpty(dataScope)) {
            queryWrapper.and(dataScope);
        }
        queryWrapper.orderBy(SysDept::getParentId).asc()
                .orderBy(SysDept::getOrderNum).asc();
        return mapper.selectListByQuery(queryWrapper);
        // return mapper.selectDeptList(dept);
    }

    /**
     * 查询部门树结构信息
     *
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept) {
        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     *
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts) {
        List<SysDept> returnList = new ArrayList<>();
        List<Long> tempList = depts.stream().map(SysDept::getDeptId).toList();
        for (SysDept dept : depts) {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId())) {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty()) {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     *
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts) {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     *
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Long> selectDeptListByRoleId(Long roleId) {
        SysRole role = roleMapper.selectRoleById(roleId);
        return mapper.selectDeptListByRoleId(roleId, role.isDeptCheckStrictly());
    }

    /**
     * 根据部门ID查询信息
     *
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId) {
        return mapper.selectOneWithRelationsById(deptId);
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     *
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    public long selectNormalChildrenDeptById(Long deptId) {
        //select count(*) from sys_dept where status = 0 and del_flag = '0' and find_in_set(#{deptId}, ancestors)
        QueryWrapper queryWrapper = QueryWrapper.create()
                .eq(SysDept::getDelFlag, UserStatus.OK.getCode())
                .eq(SysDept::getStatus, UserStatus.OK.getCode());
        queryWrapper.and("find_in_set(" + deptId + ", ancestors)");
        return this.count(queryWrapper);
    }

    /**
     * 是否存在子节点
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId) {
        QueryWrapper queryWrapper = QueryWrapper.create()
                .eq(SysDept::getDelFlag, "0")
                .eq(SysDept::getParentId, deptId);
        long result = this.count(queryWrapper);
        return result > 0;
    }

    /**
     * 查询部门是否存在用户
     *
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId) {
        QueryWrapper queryWrapper = QueryWrapper.create()
                .eq(SysDept::getDelFlag, "0")
                .eq(SysDept::getDeptId, deptId);
        long result = this.count(queryWrapper);
        return result > 0;
    }

    /**
     * 校验部门名称是否唯一
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept) {
        long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
        SysDept info = mapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getDeptId() != deptId) {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 校验部门是否有数据权限
     *
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(Long deptId) {
        if (!SysUser.isAdmin(SecurityUtils.getUserId()) && StringUtils.isNotNull(deptId)) {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            if (StringUtils.isEmpty(depts)) {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 新增保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept) {
        SysDept info = selectDeptById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus())) {
            throw new ServiceException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        return mapper.insert(dept);
    }

    /**
     * 修改保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int updateDept(SysDept dept) {
        SysDept newParentDept = selectDeptById(dept.getParentId());
        SysDept oldDept = selectDeptById(dept.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept)) {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = mapper.update(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors())) {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept) {
        String ancestors = dept.getAncestors();
        Long[] deptIds = Convert.toLongArray(ancestors);
        UpdateChain.of(SysDept.class)
                .set(SysDept::getStatus, UserStatus.OK.getCode())
                .where(SysDept::getDeptId).in(Arrays.asList(deptIds)).update();
    }

    /**
     * 修改子元素关系
     *
     * @param deptId       被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors) {
        List<SysDept> children = selectChildrenDeptById(deptId);
        for (SysDept child : children) {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (!children.isEmpty()) {
            mapper.updateDeptChildren(children);
        }
    }

    /**
     * 根据ID查询所有子部门
     *
     * @param deptId 部门ID
     * @return 部门列表
     */
    @Override
    public List<SysDept> selectChildrenDeptById(Long deptId) {
        //select * from sys_dept where find_in_set(#{deptId}, ancestors)
        QueryWrapper queryWrapper = QueryWrapper.create();
        queryWrapper.select(SYS_DEPT.ALL_COLUMNS);
        queryWrapper.and("find_in_set(" + deptId + ", ancestors)");
        return this.list(queryWrapper);
    }

    /**
     * 删除部门管理信息
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId) {
        SysDept dept = UpdateEntity.of(SysDept.class, deptId);
        dept.setDelFlag(UserStatus.DELETED.getCode());
        return mapper.update(dept);
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t) {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList) {
            if (hasChild(list, tChild)) {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t) {
        List<SysDept> tlist = new ArrayList<>();
        for (SysDept n : list) {
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue()) {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t) {
        return !getChildList(list, t).isEmpty();
    }
}
